A-320 Fingertip pulse oximeter, based on all digital technology, is intended for noninvasive spot-check measurement of SpO2 and pulse rate. The product is suitable for use in family, hospital (including clinical use in internist/surgery, anesthesia, pediatrics and etc.), oxygen bar, social medical organizations and physical care in sports. Features: Lightweight and Easy-To-Use. Color OLED display, simultaneous display for testing value and plethysmogram Adjust the parameters in friendly menu. Big fonts mode is conveninet for user reading the results. Manually adjust the direction of interface. Low Battery voltage indicator Visual alarm function. Real-time spot-checks Automatically switch off when no signal. Standard two AAA 1.5V Alkaline Bаttеrу is available for power supply. Advanced DSP algorithm inside minish the influence of motion artifact and improve accuracy of low perfusion. Specifications: Two AAA 1.5v batteries can be operated continuously for 30 hours normally Hemoglobin saturation display: 35-100% Pulse rate Display: 30-250 BPM Power Consumption: Smaller than 30mA(Normal) Resolution: Hemoglobin Saturation (SpO2): 1% Pulse rate: 1BPM Measurement Accuracy: Hemoglobin Saturation(SpO2 ): (70%-100%): 2% unspecified(≤70%) Pulse rate: 2BPM Measurement Performance in Low perfusion Condition: 0.2%